MC145076 Stereo Audio FIR Smoothing Filter

CMOS

The MC145076 is a combination re–clocking and smoothing filter designed especially for the MC145074 Stereo Audio DAC. Its versatility however, allows it to be used with any single bit–stream data converter to provide output reconstruction filtering, and to improve performance by restoring pulse shape integrity. The MC145076 provides a well controlled, filtered output that can be used directly, or with a current summing operational amplifier.

• Single–Ended Stereo Outputs Require no Additional Smoothing Filters

• 86 dB S/D, 96 dB S/N with MC145074 @ 192 x OSR Single Ended

• > 100 dB S/(N+D) @ 256 OSR, Differential Mode

• 18.5 MHz Maximum Serial Data Input Rate

• – 80 dB Cross Channel Interference

• 72–Tap FIR with > 40 dB Alias Filtering

• Operating Temperature Range: – 40 to + 85°C

• Buffered Data Clock Output for Ease of Data Generation

• 16–Pin Narrow Body SOIC Package

• Single Supply Operation: + 5 V